1 Answer

verify that your finger print reader device is supported by your kernel , if not get module to support the device . fprintd-pam, fprintd and libfprint these are packages shipped with fedora for finger print reader , check them either installed or not installed . You may reqiured to install GDM related some additional packages meanwhile

Now go to Settings | Details | Users to open the user configuration ..

Can You see this :--->

Here You can see finger print login is disabled . simply click on it and it will open the configuration wizard